Muchun Song 3555de57dc gpiolib: Fix possible use after free on label ...

[ Upstream commit 18534df419041e6c1f4b41af56ee7d41f757815c ]

gpiod_request_commit() copies the pointer to the label passed as
an argument only to be used later. But there's a chance the caller
could immediately free the passed string(e.g., local variable).
This could trigger a use after free when we use gpio label(e.g.,
gpiochip_unlock_as_irq(), gpiochip_is_requested()).

To be on the safe side: duplicate the string with kstrdup_const()
so that if an unaware user passes an address to a stack-allocated
buffer, we won't get the arbitrary label.

Also fix gpiod_set_consumer_name().

Signed-off-by: Muchun Song <smuchun@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2019-02-12 19:46:57 +01:00

..

aspeed.h

gpio: aspeed: Add interfaces for co-processor to grab GPIOs

2018-07-02 16:10:15 +02:00

consumer.h

gpiolib: Fix possible use after free on label

2019-02-12 19:46:57 +01:00

driver.h

gpio: Assign gpio_irq_chip::parents to non-stack pointer

2018-10-10 14:03:27 +02:00

gpio-reg.h

…

machine.h

…